Dust-collector.



B. U. GAAR.

DUST COLLECTOR.

APPLICATION FILED MAY 21, ms.

1,177,506. Patented Mar. 28,1916.

avwanto'v i/. [1 00/ Wihwooea Z M W BEN'NIE U. GAAR, 0F SPOKANE,

WASHINGTON, ASSIGNOR OF ONE-HALF TO ARTHUR R.

LOCKWOOD, OF SPOKANE, WASHINGTON.

DUST-COLLECTOR.

Application filed May 21, 1915.

To all 'u'liom it may concern:

Be it known that l. lbcxxin U. GAAR, a citizen of the lT-nited States.residing at Spokane. in the county of Spokane and State of \Yashington.have invented new and useful Improvements in Dust-Collectors. of whichthe following is a specification.

This invention relates to that class of devices which are generallyknown as dust collectors, and it has for its object to produce a deviceof this class which will be especially adapted to be applied to and usedin connection with an ordinary grain separator or threshing machine ofwell known construction.

A further object of the invention is to produce a device of the classdescribed which may be conveniently installed upon or applied to anordinary threshing machine for the purpose of removing dust and gasesarising during the operation of the machine, thereby eliminating thedanger of tire from this source, it being well known that destructivetires have been frequently caused by the explosive dust and gaseouscontents of threshing machines being ignited by sparks caused by theteeth of the cylinder striking hard substances accidentally iutroducedinto the machine and from other causes.

A further object of the invention is to produce. a dust and gascollector which while removing the dangerous and obnoxious dust andgases from the interior of the machine will not interfere with thepassage of small particles of straw, chaff and the like.

\Vith these and other ends in View which will readily appear as thenature of the invention better understood, the same con sists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawing has been illustrated a simple and preferredform of the invention. it being. however. understood that no limitationis necessarily made to the precise structural detailstherein exhibited,but that changes, alterations and modifications within the scope of the.claims may be resorted to when desired.

In the drawing.-Figure l is an end view of a fan used in connection withthe invention. Fig. 3 is a sectional detail view taken Specification ofLetters Patent.

Patented Mar. 28, 1 91 6.

Serial No. 29,656.

on the line 22 in Fig. 1. Fig. 3 is a perspective detail view showingthe screen casing with parts broken away. Fig. -L is a $00- tional viewtaken on the line t,t in Fig. 5 of the fan casing or housing and relatedparts. Fig. 5 is a sectional view taken on the line 57 in Fig. i. Fig.(3 is a perspective detail view of the gate or valve removed from thehousing. Fig. 7 is a diagrammatic view illustrating the application ofthe invention to a threshing machine.

(oi-responding parts in the several figures are denoted by likecharacters of reference.

The casing or housing 15 of the improved device is preferably ofrectangular shape, the walls thereof being provided adjacent to theirlower edges with tlange members 16 of L-shaped cross section for thepassage of boltsor other devices; whereby it may be mounted on the deck1? of an ordinary threshing machine. The housing is providd with anupwardly tapered top portion 18 having an opening 11) communicating witha discharge duct 20 which has been shown in the form of an elbow andwhich may c mmunicate with the outer air, although, when desired. areceptacle may b connected therewith to receive material dischargedtherethrough. The casing or housing has a transverse partition '21extending downwardly from th top portion 18 and termi- Hating somedistance ab ve he lower edges of the side walls so as to produce anopening 2;. it being understood that the bottom of the housing may beformed by the deck of the threshing machine on which it is mounted.Slidably engaging the partition :21 is a gate or valve 23 which isequipped with racks '34 engaged by pinions Z5 mount ed on a shaft it)which i supported for rota tion in the walls of the casing, said shafthaving a hand wheel '26. whereby it may be rotated to etl'ect adjustmentof the gate or valve for th purpose of varying the area of the opening'22.

The casing is divided by the partition '11 into two compartments ll. thelatter of which (Ollllltllllitfzllcs with the discharge duct 20, thepartition being so arranged as to obstruct communication between thecompartment and the discharge. duct except through the opening 2'. andthe chamber B. The latter chamber or compartment contains a fan :27which is mounted on a shaft 25 that projects through the wall of thehousin suitable supports or pedestals '2 being pro vided to a ltordbearings for said shaft which is also provided with a driving pulley 10to receive lnotion through the medium of a belt or band 31 from a sourceol' power such as a moving part of the threshing machine to which thedevice is applied.

The compartment is provided with a plurality of inlets 12 which may beformed either in the walls of the housing bounding said compartment orin the deck of the threshing machine on which the housing is mounted.said openings being preferably equipped with sleeves 3 for the receptionof slidable ducts 34. each carrying a screen casing t. one of saidcasings being shown in detail in Fig. I of the drawings. The ducts 1Hextend'through the deck of the threshing machine so that the casingswill he sup ported below the. deck and within the casing of thethreshing machine. Each of the screen casings is composed of an upwardlybulged rectangular top member 33 which for convenience will be calledthe dome. said top member having hingedly connected with the front edgethereof a screen 31' made preferably of slotted sheet metal. althoughsuitable t'oraminous material of any kind may be employed. The side andrear edges of the screen are connected with the side and rear edges ofthe dome by wall members :37 ot' llexible material. such as textilematerial, leather or the like. which is capable of col lapsing.aecordionwvise. to permit the rear edge of the screen to swing upwardlyin the direction of the rear edge of the hood. The screen which facestoward the front end ol the threshing machine will thus be supported ina downwardly and r 'arwardly inclined position. and its rear portionwill be capable of swinging upwardly. as will be readily understood.

in the operation ol this device when properly installed. as illustratedin Fig. 7. material led into the threshing machine will be subjected tothe usualbeating and shaking operation. and as it passes rearwardly. thematerial will pass beneath the several screen casings in which suctionis set up by means of the fan 27 to which rotary motion is imparted. Thebroken material. such as straw. grain and the like. passing beneath thescreen casings in a state of. agitation. it is obvious that the lightersubstances will rise through the screens 3t? and will be carried throughthe ducts 2H. openings 3'. and compartment beneath the gate or valve 2and through the tan. compartment from which it will be dischargedthrough the duct '20. By the suction set up in the respective screencasings it is true that material such as chalt. bits: of straw and thelike will be attracted and will be caused to some extent to adhere tothe screens and to obstruct the openings therein: it is found. however.that.

the material which is constantly passing in a rearward direction throughthe casing of the threshing machine will exert a wiping ac tion on theunder faces of the screens. whereby the latter will be kept sutlicientlyclean and open for all practical purposes. it being, moreover. notablethat the screens will not obstruct the re.-trw.-trd passage of materialthrough the threshing machine. because they will yield in an upwarddirection when material comes in unusually heavy masses. It may also bestated that owing to the peeuliar action of the screens with rel'erenceto the material passing through the machine. the preferred constructionot the screens is that shown in big. t. each screen being composed ol' asheet ol' metal having narrow elongated slits or slots that will permitthe passage only of line dust and such material as itis desired toeliminate. while bits of straw, chatl and the like will be readily wipedfrom the faces ol' the screens.

lly the improved device which may be constructed and installed at a verymoderate expense. the obnoxious and dangerous dust and gases will be.completely eliminated from the straw. thereby avoiding danger of tire toa very large extent.

Another very important advantage is that the straw will be freed fromimpurities. and thereby rendered more fit for use as animal bedding andthe like. while the removal of dust will also prevent vermin frombleeding therein.

llaving thus described the invention, what is claimed as new. is:-

1. The t'fOIHblHzltlOll with a conveyer and a casing for said conveyer.ot a dust collector and eliminator comprising a housing having twoconnnunicating compartments and a gate. tor varying the area of theopening of communication. one compartment being provided with aplurality of inlets and the other compartment having an outlet. meansfor setting up an air current in the last mentioned compartment(lischarging through the outlet. ducts communicating with the inlets ot'the first mentioned compartment and extending within the casing of theconvever. and screen casings carried by said ducts.

3. The combination with a conveyer and a casing for said conveyer. ot' adust collector and eliminator comprising a housing having twocommunicating compartments and a gate for varying the area of theopening of communication. one compartment being provided with aplurality of inlets and the other compartment having an outlet. meansl'or setting up an air current in the last lncntioned compartmentdischarging through the 'outlet. ducts conuuunieating with the inletsot' the lirst mentioned coinpartment and extending within the easing ofthe conveyer. and screen casings carried by said ducts, said screencasings comprising each a dome, a screen hingedly connected therewith,and flexible collapsible wall members connecting the screen with thedome.

3. In a device of the class described, the combination with a conveyerand a casing for said conveyer, of a screen casing sup: ported withinthe same, said screen casing comprising a dome, a downwardly andrearwardly inclined screen hingedly connected therewith, and flexiblewall members connecting the screen with the dome, said screen facingforwardly with respect to the conveyer, and means for setting up suctionwithin the screen casing to extract dust and light particles from thematerial passing over the conveyer.

4. The combination with a threshing machine, of a housing supported onthe deck thereof, Said housing having an outlet and Copies of aplurality of inlets, a driven blower arranged in the housing for settingup suction through the inlets, a conveyer in the casing of the machine,hoods supported at intervals above the conveyer, duets connecting saidhoods with the inlets of the blower casing, screens flexibly suspendedfrom the hoods and lying in the path of material passing over theconveyer, and flexible walls connecting the free edges of the screenswith the hood, whereby the exposed faces of the screens will be wiped bythe straw and chaff passing over the conveyer, leaving said screens freefor the passage of dust.

In testimony whereof I aflix my signature in presence of two witnesses.

BENNIE U. GAAR.

Witnems E. E. TRICKEL, R. L. BEASON.

this patent may be obtained for he cents each, by addressing theCommissioner 0! Patents,

Wellington, 1). 0."

